Is it possible to drive other properties in realtime with a single float or int property button without using drivers?
Yes, this is possible, it can be done 2 ways.


Using a property set or update callback.This lets you either use your property as a way to access other data (by having get &amp; set callbacks, you could for example, keep your property outside of the blend file even).With an update function you can use this property to control others.See https://www.blender.org/api/blender_python_api_current/bpy.props.html#get-set-example
Using drivers, although these need to be setup in the file each time and probably not what you're after.